The value of tCpmIpFilterEntryProtocol specifies the IP protocol
to match. It can be set to -1 to disable matching Cpm protocol. If
the protocol is changed, the protocol specific parameters are reset.
For instance, if protocol is changed from TCP to UDP, then the objects
tCpmIpFilterEntryTcpSyn and tCpmIpFilterEntryTcpAck will be turned
off.